Police line up outside the Lawrence Police Department for the funeral procession of Sgt. Ian Taylor, a Billerica policeman who formerly served the city of Lawrence. (Libby O’Neill/Boston Herald)

Lawrence Fire Department hangs an American flag above South Broadway Street in Lawrence to honor the life of Sgt. Ian Taylor, a Billerica policeman. (Libby O’Neill/Boston Herald)

Officers salute the casket of Sgt. Ian Taylor, a Billerica policeman who formerly served the city of Lawrence, at Saint Patrick Parish in Lawrence. (Libby O’Neill/Boston Herald)

Officers carry the casket of Sgt. Ian Taylor, a Billerica policeman who formerly served the city of Lawrence, down the steps of Saint Patrick Parish in Lawrence. (Libby O’Neill/Boston Herald)

Officers gather outside Saint Patrick Parish to honor the life of Sgt. Ian Taylor, a Billerica policeman who formerly served the city of Lawrence. (Libby O’Neill/Boston Herald)

A funeral procession for Sgt. Ian Taylor drives by the Lawrence Police Department where he served for a dozen years before joining the Billerica Police Department. (Libby O’Neill/Boston Herald)

Police line up outside the Lawrence Police Department for the funeral procession of Sgt. Ian Taylor, a Billerica policeman who formerly served the city of Lawrence. (Libby O’Neill/Boston Herald)

Lawrence police salute the funeral procession for Sgt. Ian Taylor, a Billerica policeman who formerly served the city of Lawrence. (Libby O’Neill/Boston Herald)

People stand outside of Lawrence Police Department to honor the life of Sgt. Ian Taylor, a Billerica policeman who formerly served the city of Lawrence. (Libby O’Neill/Boston Herald)

Lawrence police salute the funeral procession for Sgt. Ian Taylor, a Billerica policeman who formerly served the city of Lawrence. (Libby O’Neill/Boston Herald)